Lifting and transporting apparatus for projectiles.



J. A. ESSBERGER. LII-TING AND TRANSPORTING APPARATUS FOR ,PROJEGTILES.

' APPLICATION FILED NOV. 1, 1911.

Patented Dec. 17, 1912.

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9 ms flziam J. A. ES-SBERGER. LIFTING AND TRANSPORTING APPARATUS FOR PROJEGTILBS.

APPLICATION FILED NQV.1, 1911.

Patented Dec. 17, 1912.

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fi I bio/1n AEssber e 3 r W 6zls1%rr y J. A. ESSBERGER.

vLIFTING: AND TRANSPORTING APPARATUS FOR PROJEGTILES.

' APPLICATION FILED 11011, 1911.

1,047,773. Patented Dec. 17,1912.

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ANouiiAPl-l C0,; WASHINGTON. D. c.

I I To all whom it may concern) JOHN A. ESSBERGER, or 3mm, GERMAN LIFTING AND .TRANSPORTING APPARATUS FOR PRo Eo'rILns; i

Be it known that I, JOHN A. ESSBERGER, engineer, a subject of theEmperor of Germany, residing at Miinchenerst-rasse 18, Berlin, Germ-any,haveinvented certain new and useful Improvements in Lifting and Transportin' Apparatus for Projectiles, of which the fol owlng is a specification. 'My invention relates to l ft ng andtransporting apparatus for projectiles on board ship. Owing tothe small-space at disposal for such apparatus onbattle-ships and the like and to the necessity I of limiting the weight as much as possible and,'in addition,

to the'necessity of absolute safety of working such difficulties areimet with that no sat- I isfactory construction of apparatus has herethereto, my improvedliftinv tofore been designed. In ,contradistinction and transport:- ing apparatus not only perfect-1y fulfils the said requirements but occuples butfvery little space. I 1; s

One illustrative embodiment of myinvention and some modifications thereof are rep resented byway of example in panying drawings, 'wherein: v a Figure 1 is a sectional side elevatlon showingthegeneral arrangement of my apparatus, Fig. 2'is an end elevation ofthe 11ft ing driving gear, andFig. 8 is'an-endelevation of the traveling crabor trolleyt'havlng a projectile suspended therefrom; Figs. 4 and 5 are sectional side and end elevatlon,

respectively, showing; the trolley on a enlarged scale; Fig. 6 is a sectional end elevationshowinga modified form ofthe latter, 'and'Figs. 7- to 9 are sectional detailvlews showingthe'drive of the load drum. 1

Referring firstlyto Figs. 1'to 3, the numeral '1 deslgnates the lifting spindle. ,It is formed as a hollow shaft in whlch is mounted the traversing spindle 2. The: lifting spindle passes coaxially through the load drum 3 which carries on a band 4 the grab 5 for the projectile 6. I The spindle orshaft l is driven by the motor? through the me; dium of the worm 8 and the worm-wheel 9,

i I and the spindleor shaft2 is drivenin like v so manner by the motor. 10. As theho-llow shaft 1 must be made as light as possible itv is not able to carry the load drum and the projectile. For this reason the drum, as

clearly shown in'Figs. 4to-6, is'suspended in supports 11. These supports are provided with rollers running on a girder 12' i attached to the deck.- The drum together i f i ,Speciflcation of Letters Patent.

the accom-'- primitive kind of trolley. The drum itself may be considered to be the frame of the trolley.

Patented Dec. 17, 1912. Application filed November 1,1911. SerialNo. 657,942.

with the supports androllers thus .form

. I The hollow shaft 1 has a slot alongits entire length in order to be able toconnect the interior nut 39 on the endless screw 2 with the, drum 3. The connecting member 3? between the drum. and the nut acts inthe slot as a tongue and'groove. When wound up the proj ectile rests against the iron bands 13 which serve as abutments preventing osshown running on an H-girder, whereas the latter is substituted in. Fig; girders... i i v When a certain length is exceeded it is necessary to; make the hollow driving shaft for the lifting movement of several parts.

' The shaftlthen. hasweak parts which it is desirable to support. This can be done by providing at the joints the well-known automatically yielding tilting supports.

Instead of a spindle I may use 'for'the .traversin motion. a chain Whose one side O passes through the hollow shaft and 1s at-I 'cillation. InyFigs. 4 and the rollers are tached to the inner projection of the loadv drum servingas a nut'in the above described arrangement. The entire chain may, however, run outside the shaft. In this event it is preferable to use a tongue and groove for driving the load drum by means ofthe shaft 1. If tongue and groove are e ployed, some special measuresarenecessary in my. improved lifting and transporting apparatus.

- When connecting the tongue or feather I with the hollow lifting shaft there are difficulties owing to the wall of the shaft having to be kept asthin as possible having regard to the extreme saving of weight necessary in ship-building.. 'It is therefore impossible to let the tongue or'feather in-the usual manner into the shaft or to screw it thereto by providing a screw. thread in the wall of the hollow shaft.

For this reason, I' introduce cap screws through suitable holes in the wall into thesh'aft and hold the tongue or feather from the inside; In this kind'of connection the screw thread is provided in the tongue. -Without increas-,

ing the weight too much: the latter canbeofj I such a size that the screw thread is of sufiicient length. When the'tongues or feather is to be connected with the shaft by rivets difficulties are met with in this case also. ,g

and also somewhat great consumption of rivets 17. holes 18 which are located at two adjacent The rivets must also be introducedthroughl holes in the shaft and placed from the inside through the wall of the shaft and the tongue in order that they may be riveted from the outside. The shaft is connected with the load drum by such manner that the drum can be axially displaced on the shaft, but cannot rotate relatively thereto. The distance whichthe drum can be axially displaced is somewhat considerable and the speed is appreciable. Therefore, there is both considerable wear energy occasioned by frictionat the place of contact between the tongue and the load drum. In order to diminish these I provide balls at the place of contact which, on the one hand,bear against the steel tongue and,

on the other hand, run on a hardened piece of steel. The balls are in a groove which returns on itself in order that they can roll unimpededly on the tongue while the trolley is traveling.

In Fig. 7 the numeral 1 designates the hollow shaft and 14 the tongue. The screws 15 are inserted and tightened through suitably wide holes 16 located diametrally oppo-- site where the screws are fastened.

In Fig. 8 the screws are substituted by They are introduced through tongues, and are preferably midway between them. A suitable tool can be put through the same holes and held against the head of the rivet whileriveting.

In Fig. 9 the hollow shaft and tongue are again designated 1 and 14, respectively.

The tongue is connected with the hollow shaft in the manner described with reference to Fig. 8. On the side of the tongue loaded by the projectile are provided balls 19 which rest against a hardened steel rod the said tongue in .drum...journaled in said supports, a shaft coaxial with the drum for directly rotating the same, and means entirely independent of said shaft for traversing the drum.

2. In lifting and transporting apparatus for projectiles on board ship, the combination, with a girder, of a hollow shaft, a load drum, having a groove, coaXially surrounding the said shaft, supports revolubly carrying said drum, and rollers running on said girder, and carrying said supports, a tongue in said groove and secured on the outside of said shaft.

3. In lifting and transporting apparatus for projectiles on board ship, the combination, with a girder, of a hollow shaft having holes in the wall thereof, a load drum, having a groove, coaXiall'y surrounding the said shaft, supports revolubly carrying said drum, and rollers running on said girder, and carrying said supports, a tongue in said groove, and cap screws having their caps in said shaft securing said tongue on the outside thereof.

4. In lifting and transporting apparatus for projectiles on board ship, the combination, with a girder, of a shaft, a load drum, having a groove, coaXially surrounding the said shaft, supports revolubly carrying said drum, and rollers running on said girder and carrying said supports, a tongue in said groove, said drum having a second groove returning upon itself, and balls in the latter groove, adapted to run against said tongue.

5. In lifting and transport-ing apparatus for projectiles on board ship, the combination with a girder, supports movable along the girder, 'a load drum revolubly carried by the supports, a hollow shaft projecting through the drum on which it is movable, the hollow shaft having a groove, a tongue on the drum projecting into the shaft, and

189.115 inside of the hollow shaft engaging said tongue to traverse the drum, whereby the drum has a bodily movement and is rotated in all such positions by the hollow shaft.

In testimony whereof, I have signed my name to this specification in the presence of two witnesses.

JOHN A. ESSBERGER.

Witnesses:

VVOLDEMAR HAUPT, HENRY HASPER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

